On Thursday 15 November 2012 15:00:09 Richard Ray did opine: > On Thu, 15 Nov 2012, andy pugh wrote: > > On 15 November 2012 19:13, <[email protected]> wrote: > >> How might I connect this, or something similar, via a parallel port > >> inexpensively, no MESA, to provide feedback for a stepper all running > >> linuxcnc > > > > Is it quadrature output? > > Yes > The "this" above was suposed to be http://wiki.makerbot.com/mle > Had a brain fart > Thats great, I grabbed the eagle stuff and BOM. But I note that there is no index output on this board, so am I to assume that using the linear strip, cut to length and stuck on a rotating part, it will not generate a meaningful index pulse, and that to do that I would probably need to order a round magnetic wheel from one of the suppliers listed on the AMS page for that chip?
However, I note that its companion, the on axis, magnetic rotary encoder also leaves out the index pulse that chip supplies. So other than setting up a mechanical stop, and homing to that, and converting to Christian Science so you can believe it will hold true at 2500 rpms till the next powerdown, this is not going to be usable for a spindle position control. Bummer. > ------------------------------------------------------------------------ > ------ Monitor your physical, virtual and cloud infrastructure from a > single web console. Get in-depth insight into apps, servers, databases, > vmware, SAP, cloud infrastructure, etc. Download 30-day Free Trial. > Pricing starts from $795 for 25 servers or applications! > http://p.sf.net/sfu/zoho_dev2dev_nov > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page: <http://coyoteden.dyndns-free.com:85/gene> is up! Toddlers are the stormtroopers of the Lord of Entropy. ------------------------------------------------------------------------------ Monitor your physical, virtual and cloud infrastructure from a single web console. Get in-depth insight into apps, servers, databases, vmware, SAP, cloud infrastructure, etc. Download 30-day Free Trial. Pricing starts from $795 for 25 servers or applications! http://p.sf.net/sfu/zoho_dev2dev_nov _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
